Thesis social network influence on customer loyalty

Foursquare is principally funded by Union Square Ventures , Andreessen Horowitz , O'Reilly AlphaTech Ventures , and Spark Capital . The company raised $ million in its Series A round and $20 million in its Series B round . [46] [47] On June 24, 2011, Foursquare raised $50 million on a $600 million valuation. [48] Their Series D round funding of $41 million was announced on April 11, 2013 and led by Silver Lake Partners . [49] Unlike prior funding rounds that had been financed via equity , a good portion of Series D came in the form of convertible debt from existing investors. [50]